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Hi Ira,
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<div>Assuming "ipp-usb" is a Linux OP IPP USB module, and it is sharing information about the USB connected printer on a network (loopback only? all interfaces?), it could provide these additional TXT record key/value pairs if it wants to. But I don't quite
know why...USB devices are matched at a device level usually with a VID / PID / serial number. But we already know the printer implements IPP USB, so device model matching ought to be unnecessary and actually not useful. That is for vendor drivers. </div>
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<div>An IPP USB interface is a class 7 (Printer) interface and subclass 1, that implements protocol 4 (IPP USB). Class 7 devices define a USB interface descriptor that includes things like the 1284 Device ID string. An IPP USB interface has the class 7 interface
descriptor and also provides a protocol 4 specific "Device Info Descriptor" that has an "iIPPPrinterUUID" field, which is a pointer to a string descriptor containing the value provided by "printer-uuid".</div>
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<div>Seems like one might need Alexander to provide more information...</div>
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<div>Smith<br>
<br>
/**<br>
Smith Kennedy<br>
HP Inc.<br>
*/ </div>
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<blockquote type="cite">
<div>On Nov 13, 2024, at 6:55 AM, Ira McDonald via ipp <ipp@pwg.org> wrote:</div>
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<div><font face="" calibri??=""><b><span style="font-size:11.0pt;line-height:107%; color:red">CAUTION: External Email
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<div>Hi Mike,</div>
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<div>[Forwarded from OP mailing list]</div>
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<div>This looks questionable, from the point of interoperability. Comments to Alexander?</div>
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<div>Cheers,</div>
<div>- Ira</div>
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<div dir="ltr"><i><font size="1">Ira McDonald (Musician / Software Architect)</font></i></div>
<div><i><font size="1">Chair - SAE Trust Anchors and Authentication TF<br>
</font></i></div>
<div dir="ltr"><i><font size="1">Co-Chair - TCG Trusted Mobility Solutions WG</font></i></div>
<div><i><font size="1">Co-Chair - TCG Metadata Access Protocol SG<br>
</font></i></div>
<div dir="ltr"><i><font size="1">Chair - Linux Foundation Open Printing WG<br>
Secretary - IEEE-ISTO Printer Working Group<br>
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG<br>
IETF Designated Expert - IPP & Printer MIB<br>
Blue Roof Music / High North Inc<br>
<a style="color:rgb(51,51,255)" href="http://sites.google.com/site/blueroofmusic" target="_blank">http://sites.google.com/site/blueroofmusic</a><br>
<a style="color:rgb(102,0,204)" href="http://sites.google.com/site/highnorthinc" target="_blank">http://sites.google.com/site/highnorthinc</a><br>
mailto: <a href="mailto:blueroofmusic@gmail.com" target="_blank">blueroofmusic@gmail.com</a><br>
(permanent) PO Box 221 Grand Marais, MI 49839 906-494-2434</font></i></div>
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<div dir="ltr" class="gmail_attr">---------- Forwarded message ---------<br>
From: <b class="gmail_sendername" dir="auto">Alexander Pevzner</b> <span dir="auto">
<<a href="mailto:pzz@apevzner.com">pzz@apevzner.com</a>></span><br>
Date: Wed, Nov 13, 2024 at 6:36 AM<br>
Subject: ipp-usb: exposing device serial number and vendor/device ID via TXT record<br>
To: Open Printing <<a href="mailto:printing-architecture@lists.linux-foundation.org">printing-architecture@lists.linux-foundation.org</a>><br>
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Hi!<br>
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I want to be able to match devices, exported by the ipp-usb, with the <br>
underlying USB devices, because every second user asks "where is my <br>
newly connected USB printer?" and needs to be pointed to the list of the <br>
network printers.<br>
<br>
For this purpose I want to add a couple of parameters to the TXT record, <br>
published by the ipp-usb:<br>
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usb_SER=VCF9192281 ; Device serial number<br>
usb_HWID=0482&069d ; Its vendor and device ID<br>
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However, if there are already standard names defined for this purpose, <br>
I'd prefer to follow the standard. Please, point me to the right <br>
direction at this case.<br>
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WDYT?<br>
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-- <br>
<br>
Wishes, Alexander Pevzner (<a href="mailto:pzz@apevzner.com" target="_blank">pzz@apevzner.com</a>)<br>
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_______________________________________________<br>
ipp mailing list<br>
ipp@pwg.org<br>
https://www.pwg.org/mailman/listinfo/ipp<br>
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